CABEREA. 57 



of the Cheilostomata and presents, as it were, an epitome 

 of the structural characteristics of the tribe. As it is to 

 be found everywhere, the student of the Polyzoa can 

 select no better form to work upon, so far at least as 

 external structure is concerned. 



Genus CABEREA, Lamouroux. 



Der. From Caberea, daughter of Proteus. 



CABEREA, Lamx. (1816), Pol. coralL flex.: Busk: Smitt, 



CELL ARIA (sp.), Lamarck. 



FLUSTRA (sp.), Flem. : Johns t. 



I'l.i.i.i i. \KI \ (sp.), id. : id. 



(.'KIM A (sp.), Audouin. 



SELBIA, Gray, Dieffenbach's New Zealand, ii. 



FLABELLARIA, Gray, B.M. Rad. 106. 



CAXDA (sp.), D'Orb. Pal. Frau<;. 



GENERIC CHARACTER. ZOARIUM not articulated. 

 ZO<ECIA in two or more series, subquadrangular or ovate, 

 irit h a very large aperture. SESSILE AVICULARIA on the 

 side and front of the cells, the lateral avicularium minute. 

 VIBRACULAR CELLS very large, placed in two rows, stretch- 

 ing obliquely downwards across the back of the zocecia, 

 which they almost cover, to the median line, notched above 

 and traversed through a great portion of their length by a 

 shallow groove. SET.E usually toothed on one side. 



IN Caberea the zorecia have a tendency to assume a 

 somewhat quadrate form, and the aperture occupies a very 

 large proportion of the front surface. The arrangement 

 of the avicularia is much the same as in Scrupocellaria ; 

 but the lateral avicularium is very inconspicuous, and may 

 readily escape notice. The striking feature of the genus 

 is the enormous development of the vibracula, winch almost 

 cover the back of the zoariuin, and ^ivc it a very marked 

 and peculiar appearance. From the upper and outer angle 



